3 years ago

A ball is rolling across the floor at a constant speed. What will happen to the ball if it is exposed

Physics

2 answers:

ELEN [110]3 years ago

7 0

I think it’s speed will increase, if I understood it correctly

geniusboy [140]3 years ago

4 0

Answer:c

Explanation:idk how to explain it i just know cause i got it right.

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An ice cream machine produced 44 ice creams per minute. After reconditioning, its speed increase to 55 ice creams per minute. By

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3 years ago

A wheel with moment of inertia 25 kg. m2 and angular velocity 10 rad/s begins to speed up, with angular acceleration 15 rad/sec2

Pani-rosa [81]

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(A) Angular speed 40 rad/sec

Rotation = 50 rad

(b) 37812.5 J

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We have given moment of inertia of the wheel $I=25kgm^2$

Initial angular velocity of the wheel $\omega _0=10rad/sec$

Angular acceleration $\alpha =15rad/sec^2$

(a) We know that $\omega =\omega _0+\alpha t$

We have given t = 2 sec

So $\omega =10+15\times 2=40rad/sec$

Now $\Theta =\omega _0t+\frac{1}{2}\alpha t^2=10\times 2+\frac{1}{2}\times 15\times 2^2=50rad$

(b) After 3 sec $\omega =10+15\times 3=55rad/sec$

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